Muzzle equalizer and blast minimizer for gun



Sept. 27, 1960 H. c. SORENSEN MUZZLE EQUALIZER AND BLAST MINIMIZER FORGUN Filed Sept. 2, 1958- rm MB 2,953,972 PEtentedSeptZ'Z, 1960 MUZZLEEQUALIZER AND.,BLA STMINIMIZE R EORGUN -Hans.C..-Sorensen,3395tSW.:108thAvei,

Beaverton,-: Greg. 7

My present .invention is close1y.relatedjto.'the gun muzzle equalizerdescribed and claimedin my pen'ding United States .application bearingSerialNo.160l;993

filedAugust 3, 1956, on whichfurfther procce ing rare now abandoned."The essential differences .between'fthe device disclosed in thepending. applicationand'thepresent .invention herein set forth is in'theprovision of means whereby the expandinggases aredefiectedjandlorotherwise.channeled not only .to hold "the gun barrell'from jumpingupwardly but also tQminin'nZethe fiectsoflthe ;mosphere, normally expandin. the form CiflajCOlJm 'In the process of their expansion;anexcessiverecoilshock results causing. discomfort to the person'firing' the gun,

"forcing the gun barrel to'jump"upwardly,*thus:preventing the keeping ofthe gun on'thetarget, arid causing excessive muzzle. blast.

"Furthermore, as the compressed ,gases *leaveithe gun barrel, apartialvacuumis formedthereiwalid a"momentary onrush of air intothebarreluesults. fit-is within the contemplation ofthis inventiontocontrol these compressed gases and thisgonrushing airlbyfde- 'flectionand/or constriction or, by tdtherwise'channel- 'ing them, andparticularly the' compressed gases so'that the inherent disadvantagescreated by 'the EZKPEfiSiQIlZOf the compressed "gases are eitherentirelyfeliminated, 'or satisfactorily solved.

The 'quintessence :of the "-invention isto iprovideia device adaptedeither *for removable: attachmenfltothe muzzle end of the igun barrel,or *mddifying'the :gun

barrel soas to make this device'an'integral part thereof, which employsthese 'expanding gasesand onrushingiair to reduce the recoil shock,minimize: the blast-and eliminate the tendency of the gun to climbupwaijdly-ori being fired.

The principal object of my'invention-istofprovide a device for themuzzle end of'a g n barrel having means 'for directingupwardly some'o-f-thecompressed ;gases emanating from the muzzle, twostage"means--for' -partially constricting these gases to 'act-asa'ibrake there- -for, and finally, means for conjointly 'directing there:

maining compressed gases upwardly --arid ;outwardly through a graduallyenlarged dischargeiend. 4

'A corollary to the principal object ofmy inverition is to provide meansin the device foremployiiig'the-air entering the gun barrel as thecompressedggasesgare discharged to assist in controlling the gunfiring-position' of the gun by eliminating the tendency- 3f the-"gun toclimb upwardly on being fired.

Another object of my invention istoyproiride anuhi- *tarydevice'possessingstructural =-characteristics which "performs theabove-functions without mateii'ally 'dncreas c2 I ing the weight,northeilength offthe gunynor measun .ably disturb its balance. V

A still further object of my invention. is 'to;prov 1de;a

'device whichmay be firmly secured tofthermuzzle end 5 of .a gun barrelwithout the services of'a .gunsmith'and which, when properly attachedgpractically .eliminates'its radialor forward slippage on.the gun' barrelduring long periods of firing.

.A still further objectrof :my invention, istoprovide .a.muzzleequalizer and blast,,minimizerwhich is .sturdy but lightin weight,compact and inexpensive, easy to attach and applyto a standard.;gun'barrelv'vithout disturbing the. frontsightrnor damage the barrel.

A full and complete understanding otrmy invention 'and other objects,advantages andnov'el'characteristics .thereof willbecome apparent andreadily-understood from 'the following "detailed description z whichmustba :read. in connection WilhTthe "disclosures in 'the accom-.panying drawing; forming a part :hereof, and in which: Fig. 1,is'a'side elevational .viewof the device:ernbo'dying the "principles ofmy "invention shown mounted -,on themuzzlejofagun'barrel; V p 7 Fig. 2is an enlarge'd top plan-view,;pa1tially"broken away, of the deviceembodying the principles Qfymy invention'ta'kenonline2 2 of Figfil; V v

Fig. 3 is afront elevational viewtaken-on'line'"3"3 of Fig. 2;

Fig. .4 is a sectional elevation of the device embody- .ing the.principles of my inventionqtaken QI1:1l 1i e '4 -4 30,of'?-Eig."2 toshow.the structural characteristics Q'fthe interior; V V

Fig. .5 is a sectional .elevationj taken ,on"1jne f5 f5 .of "Fig.4;

'Fig..6.vis a seetion'al'eleva'tion taken onfline ti -opf Fig. .4 toshow thedetails of construction ofrthe semiicircular: eccentric groove;and V U Fig. '7'is -a sectional elevation takenpnll ncfi747rof Fig. 4 toshowthe details of construction Vo'fithe. circu- 'lar .groove. N V p I40 f'The device embodyingv my'invention consists prjmajrlily "Offflunitary body member L preferably cylindlziqailiin contour, havinga,borei2 centrally 'disposed'itherethrough, pthediameter of which isslightly larger thanthe Idjangeter of theibore :0f the. gun barrel towhich: theWdQYiE C 'is .attached'or isan integralpart thereof, -whenmeasured from "thelbottom of ..the rifiinggrooves, thereby pernndefinite'break in contact of the .lmllet with'jthe gun bore 'Withouteffecting-the control of. the compressed gases and 'onrushing' air bythe structural characteristics of the unitary body 'member' 1..The'front endiq ofthe' bodyrnemberhas a counterborewhichl is rtaperedrearwar ly, ..as shown at 4. A cucoutportion, as shown atfi ismadedirectlyabovethe taperedcounterbore 4 and has ,a ,r earwardly inclinedface fi'forme'd therein. V 'An externally threadedcollet' 7,.formed atjthe rearend of body member 1, hasa plurality,ofopenendedslots 8 formedlongitudinally therein to proyide. afiliQht tapering rearwardlythereof..Collet '7. fits, overthermuzzleend of a gunbarrel 9.fancifullyrepresentedim Eig. l. Aminternal vice is made as an integralpart of the barrel, no problem of a tight connection exists.

An angular cut out or notch 12 is made transversely of body member 1immediately in front of the muzzle end of gun barrel 9 and sufficientlydeep to penetrate the interior of bore 2 as graphically shown in Figs.1, 2 and 4. The rear portion of the cut out is vertically positionedwhile the front face slopes forwardly and outwardly, as shown at 13 andalmost meets the top of face 6 of the cut out portion at their commonapex 14. The function of this cut out portion will be explainedforthwith.

A crescent shaped eccentric groove 15 is formed in bore 2 approximatelymidway of and below the cut out portion 12 of body member 1. The frontWall 16 of groove 15 is positioned at right angles to the bore 2 whilethe base 17 of the groove 15 is inclined rearwardly at an obtuse angleto the bore 2. Another groove 18 is formed within bore 2 slightly infront of the crescent shaped eccentric groove 15 approximately below theapex 14 formed by the junction of the respective faces 6 and 13 of cutout portions 5 and 12 respectively. Groove 18 is an iota deeper than theeccentric groove 15, in fact it is almost imperceptible and difiicult toreveal in the drawing, but its front wall 19 is parallel to the frontwall 16 of groove 15 as indicated by the lines marked y in Fig. 4 andits base 26 is rearwardly inclined at the same angle as the angle ofbase 17 of groove 15 as graphically shown by the lines marked x in Fig.4.

The specific function of these structural characteristics as well as theothers, will now be explained.

M odus operandi The device embodying the principles of my inventiondealing as it does with compressed gases seeking to expand afterescaping from a gun barrel, employs Newtons physical law of motion incontrolling the movement of these gases and their ultimate dissipationas well as controlling the onrushing air entering the gun barrel to fillthe partial vacuum created by the emergence of the gases from the gunbarrel. As these gases escape from the gun barrel a limited amount isdeflected upwardly and expands through the cut-out portion 12 of thedevice. Newtons physical law referred to above states that for everyaction there is an equal and opposite reaction-the jet propulsionprinciplecomes into play and as these gases expand upwardly throughcut-out 12, a corresponding downward reaction results which, actingagainst the body member 1 secured to the gun barrel 9, helps to suppressthe muzzle rise usually accompanying the recoil shock. The sameprinciple comes into play but with lesser effect when the onrushing airbegins to enter the gun barrel to fill the partial vacuum created by theemergence of the compressed gases and this also helps to suppress muzzlerise. As the remaining gases leave the device through its front, theirexpansion upwardly through cut-out portion 5 is a further aid to muzzleholddown.

Resistance to the smooth flow of the compressed gases which do notescape through cut-out 12 is first offered by the crescent shapedeccentric groove 15 and then by circular groove 18 in bore 2. Thepresence of these grooves possessing the structural characteristicsdelineated above creates a sufficient turbulence in the bore 2 andresistance to the smooth flow of the escaping compressed gases towardthe front of the device so as to create a momentary trap or a braketherefor-thus a suificient restrictive force is imposed upon thesecompressed gases which counteracts the normal excessive recoil on firingof a high powered rifle and thereby minimizes the same.

As these remaining gases seek to escape through the body member 1, thecounterbore at the front thereof allows them to spread over a muchlarger area making it easier for their expansion. This structuralcharacteristic of the device and the escape of some of the gases throughcut-out 12, minimizes the muzzle blast normally encountered when noblast suppressor or similar device is employed.

As some changes are possible in the embodiment of the invention aboveset forth, it is to be understood that all matter herein set forth orshown in the accompanying drawing is to be interpreted as illustrativeof the invention, and not in a limiting sense, but any permissiblechange must fall within the purview of the following claims, in which Iclaim as new and desire to secure by Letters Patent: 7

1. A new article of manufacture to be used in conjunction with gunsadapted to fire projectiles, comprising a body member supportable by andprojecting in advance of the muzzle of a gun barrel, said body memberhaving a bore in line with the bore of the barrel through which aprojectile may pass but being slightly larger in diameter, a counterboreformed at the front end of said body member in line with the borethereof but uniformly tapering outwardly therefrom, a cut-out portionformed in said body member immediately above said tapered counterbore,the face of which extends angularly and rearwardly from the front ofsaid body member, another cut-out portion formed immediately in back ofsaid first cut-out portion and entering into the bore of said bodymember with its face extending angularly and forwardly toward the frontof said body member, a circular groove formed in the bore of said bodymember immediately below the juncture of the respective faces of saidcut-out portions, a crescent shaped eccentric groove formed within saidbore immediately in back of said circular groove and below therearwardly positioned cut-out portion, and means for anchoring said bodymember to the muzzle end of a gun barrel.

2. A new article of manufacture to be used in conjunction with gunsadapted to fire projectiles, comprising a body member supportable by andprojecting in advance of the muzzle of a gun barrel, said body memberhaving a bore in line with the bore of the barrel through which aprojectile may pass but being slightly larger in diameter, a counterboreformed at the front end of said body member in line with the borethereof but uniformly tapering outwardly therefrom, a cut-out portionformed in said body member immediately above said tapered counterborethe face of which extends angularly and rearwardly from the front ofsaid body member, another cut-out portion formed immediately in back ofsaid first cut-out portion and entering into the bore of said bodymember with its face extending angularly and forwardly toward the frontof said body member, a circular groove formed in the bore of said bodymember immediately below the juncture of the respective faces of saidcut-out portions, a crescent shaped eccentric groove formed within saidbore immediately in back of said circular groove and below therearwardly positioned cut-out portion, the front wall of each of saidgrooves being parallel to each other with the circumference of the wallof the circular groove being greater than that of the wall of thecrescentshaped groove and the base of each of said grooves beingangularly disposed to the bore of said body member, and an externallythreaded collet having a plurality of longitudinal slits thereinextending from said body member and adapted to fit over the muzzle endof a gun barrel, and a lock nut threadably secureable thereto to anchorsaid collet to said muzzle end of a gun barrel.

3. A new article of manufacture to be used in conjunction with gunsadapted to fire projectiles, comprising a body member supportable by andprojecting in advance of the muzzle of a gun barrel, said body memberhaving a bore in line with the bore of the barrel through which aprojectile may pass but being slightly larger in diameter, a counterboreformed at the front end of said body member in line with the borethereof but uniformly tapering outwardly therefrom, a cut-out portionformed in said body member immediately above said tapered counterborethe face of which extends angularly and rearwardly from the front ofsaid body member, another cut-out portion formed immediately in back ofsaid first cut-out portion and entering into the bore of said bodymember with its face extending angularly and forwardly toward the frontof said body member, a circular groove formed in the bore of said bodymember immediately below the juncture of the respective faces of saidcut-out portions, and a crescent shaped eccentric groove formed withinsaid bore immediately in back of said circular groove and below therearwardly positioned cut-out portion.

4. A new article of manufacture to be used in conjunction with gunsadapted to fire projectiles, comprising a body member supportable by andprojecting in advance of the muzzle of a gun barrel, said body memberhaving a bore in line with the bore of the barrel through which aprojectile may pass but being slightly larger in diameter, a counterboreformed at the front end of said body member in line with the borethereof'but uniformly tapering outwardly therefrom, a cut-out portionformed near the rear of said body member and entering into the bore ofsaid body member with its face extending angularly and forwardly towardthe front of said body member, a circular groove formed in the bore ofsaid body member immediately to the rear of said tapered counterbore, acrescent shaped eccentric groove formed within said bore immediately inback of said circular groove and below the rearwardly positioned cut-outportion, the front wall of each of said grooves being parallel to eachother with the circumference of the wall of the circular groove beinggreater than that of the Wall of the crescent-shaped groove and the baseof each of said grooves being angularly disposed to the bore of saidbody member, and means for anchoring said body member to the muzzle endof a gun barrel.

5. A new article of manufacture to be used-in conjunction with gunsadapted to fire projectiles, comprising a body member supportable by andprojecting in advance of the muzzle of a gun barrel, said body memberhaving a bore in line with the bore of the barrel through which aprojectile may pass but being slightly larger in diameter, a counterboreformed at the front end of said body member in line with .the borethereof but uniformly tapering outwardly therefrom, a cut-out portionformed near the rear of said body member and entering into the bore ofsaid body member with its face extending angularly and forwardly towardthe front of said body member, a circular groove formed in the bore ofsaid body member immediately to the rear of said tapered counterboreface of said cut-out portion, a crescent shaped eccentric groove formedwithin said bore immediately in back of said circular groove and belowthe rearwardly positioned cut-out portion, an externally threaded collethaving a plurality of longitudinal slits therein extending from saidbody member and adapted to fit over the muzzle end of a gun barrel, anda lock nut threadably 'secureable thereto to anchor said collet to saidmuzzle end of a gun barrel.

References Cited in the file of this patent UNITED STATES PATENTS817,134 Smith Apr. 3, 1906 1,988,807 Pierson Oct. 12, 1932 2,567,826Prache Sept. 11, 1951 FOREIGN PATENTS 972,500 France Apr. 30, 1950

